Safety-padlock.



Patented Apr. 11, 1916.

2 SHEETS-SHEET 1.

THE COLUMBIA PLANOURAFH c0. WASHINGTON. D. C.

J. ROLKA.

SAFETY PADLOCK.

APPLICATION FILED DEc.22, 19:5.

Patented Apr. 11, 1916.

2 SHEETS-SHEET 2.

THE COLUMBIA ELANOGRAPH co., WAsl-flNa'raN, 'D. C.

JAMES ROLKA, 0F BALTIMORE, MARYLAND.

SAFETY-PADLOCK.

Specification of Letters Patent.

Patented Apr. 11., 1916.

Application filed December 22, 1915. Serial No. 68,205.

To all whom it may concern:

Be it known that I, JAMEs RoLKA, a subject of the Czar of Russia, residing at Baltimore and State of Maryland, have invented certain new and useful Improvements in Safety-Padlocks, of which the following is a specification.

This invention relates to new and useful improvements in safety padlocks.

The primary object of the invention is the provision of a padlock having a double retaining means for the shackle thereof, said means being individually releasable and having a predetermined order of actuation.

A further object of the device is the provision of a padlock having a key actuated locking member necessarily released in ad vance of a knob releasable catch device, whereby a double lock is provided which requires a knowledge of the operation thereof in order to accomplish a releasing of the lock shackle.

The. invention therefore furnishes a padlock structure incapable of operation by an unauthorized person and affording a safety lock even in the hands of an unauthorized person having possession of the proper key.

With these general objects in view and others that will appear as the nature of the invention is better understood, the same consists in the novel combination and, ar-

- rangement of parts hereinafter fully described, illustrated in the accompanying drawings andthen claimed.

In thedrawings forming a part of this application and in which like designating characters. refer to corresponding parts throughout the several views:-Figure 1 is a front elevation of the device. Fig. 2 is a side elevation thereof partially broken away. Fig. 3 is a view similar to Fig. lbut with the front plate of the lock removed. Fig. 4 is a perspective view of the inner side Offtllfl front plate detached and the elements shown in their locking positions. Fig. 5 is a view slmilar to Fig. 3 with the key operated'retaining means released and with the knob releasing catch shown in dotted lines in its released position. Fig. 6 is a view similar toFig. 5 but with the shackle withdrawn, and Figs. 7 8, 9, 10 and 11 are perspective views respectively of the shackle,

lock bolt, releasing finger, slide plate and locking catch of the device detached. 7

It being understood that'thepresent device is of the padlock form of retaining devices, the saine as herein illustrated includes a substantially rectangular casing 10 hav- 7 ing a chamber 11 therein for holding the lock mechanism while a substantially U- shaped shackle 12 is slidably carried by the casing 10 being arranged for movement through opposite slots or openings 13 and lt in the squared end 15 of'the saidcasing, the opposite end 16 of the casing being of curved formation.

The shackle 12'has its free ends thereof formed of different lengths, the longer end or arm 17 being slidably arranged through the aforementioned slot 13 and having a bolt engaging notch 18 upon one side thereof and a stop receiving notch 19 upon its other or outer side while the relatively short arm 20 of the shackle 12 is adapted to slide outwardly and inwardly through the casing slot 14: and has a catch engaging notch 21 adjacent its free end and arranged within the casing chamber 11 when theshackle is retracted and at which times the curved free end 22 of the shackle arm 17 is seated within a receiving recess 23 in the opposite corner of the inner surface of the casing.

A pivoted lock bolt'2l of the form best illustrated in Fig. 8 of the drawings is swingingly mounted within the chamber 11 upon a transversely arranged pin 25, while a leaf spring 26 carried by the casing 10 and tensioned by a rib 27 thereof resiliently engages one" side of the said bolt for projectinga heel 28 thereof into locking engageinent withv the shackle arm notch 18 when the shackle is forced inwardly as illustrated in Fig. 3. A slide plate 29 is provided: for releasing the bolt 24; and has an angular end 30 engaging the toe 31 of the said bolt atthe'free end of the latter, the said plate being slidably arranged upon a block 32 carried by the casing and an adjacent portion 33 of the inner end wall of the latter.

A curved releasing finger 34 is'secured to a turn post 35 journaled in the casing 11, the said finger being freely positioned with in the side cut away portion .36 of the slide plate 29. A squared end 37 of the turn post 35 extends in alinement with a keyhole opening lock casing and a socketed key 40 is adapted to enter the plate opening 38 for seating engagement with the squared end 37, as best illustrated in Fig. 2 of the drawings,

38 in the front plate'39 of the whereupon a turning of the key 40 in therein a corresponding direction, thus shifting the lock bolt 24 with its heel 28 out of engagement with the shackle notch 18 and with the elements arranged as shown in Fig. 5.

The above described key releasing locking means for the shackle 12 is designed to cotiperate with .a locking catch so arranged that the said catch cannot be released until after the release of the lock bolt 24. This catch arrangement comprises a catch 41 pivoted upon a pin 42 within the casing 10 and normally projected within the path of movement of the shackle arm 20 by means of a leaf spring 43 tensioned against a post 44 of the casing 10, the said catch 41 having an end hook 45 for engagingthe shackle notch 21 when the shackle arm 20 is forced inwardly, it being noted that the said arm 20 has a terminal beveled head 46 adapted to engage the adjacent face of the catch hook 45 and swing the same laterally upon the entering movement of the arm 20.

The lock bolt 24 is provided with a substantially radially projecting arm 47 which is received within a stop notch 48 in the adjacent side of the catch 41, and by which means the said catch is restrained against movement excepting when the lock bolt 24 is in its released position. A stop post 49 is arranged for limiting the swinging movement of the catch 41 inwardly of the casingslot 14. A shaft 50 is journaled through the front plate 39 of the casing and has a turn knob or button 51 upon its outer end while a ward 52 is arranged upon its inner end and adapted to engage the catch 41 for swinging the same to its released position as shown in dotted lines in Fig. 5, when the said knob 51 is turned in the required direction. A take-up spring 53 is carried by the shaft 50, while the ward 52 has a socket 54 therein which is journaled upon a projecting pin 55 mounted within the casing 10. p

A spring bolt 56 is shiftably arranged within the side socket 57 of the casing 10 and is normally projected by means of a spring 58 into frictional engagement with the adjacent side of the shackle 12, it being noted that when the shackle is projected, the stop 56 enters the shackle arm notch 19 and prevents a further withdrawal of the shackle and also releasably retains the shackle and prevents vibrations thereof.

From this detailed description of the device, it will be understood that with the shackle 12 forced inwardly in its locked po sition as shown in Fig. 3, the engaging catch 41 cannot be released by the knob 51 until after the bolt arm 47 has been disengaged from the catch notch 48, the latter operation being only possible by swinging the lock bolt 24 for releasing the shackle arm 17 by means of the slide plate 29 upon the actuation of the key 40. When the shackle is projected as shown in Fig. 6, the same may be manually forced inwardly of the casing chamber 17 and whereby the bolt heel 28 automatically engages the arm notch 18 substantially simultaneously with the engagement of the catch hook 45 with the shackle notch 21, it being noted that the bolt heel maintains the bolt arm 47 out of engagement with the catch notch 48 until the heel ti snaps over the shackle notch 18 and whereupon the arm 47 engages the catch notch 48 and prevents any releasing movement of the catch prior to a releasing actuation on the part of the bolt 24. It will be understood of course that when the bolt 24 is held retracted by the key 40 as shown in Fig. 5, a forcing inwardly of the shackle will engage the same with the catch hook 45 while at such times the button 51 maybe freely employed swinging the catch 41 to its released position.

While the form of the invention herein shown and described is what is believed to be the preferable embodiment thereof, it is l/ nevertheless to be understood that minor changes may be made in the form, proportion and details of construction without departing from the spirit and scope of the invention hereinafter claimed.

What I claim as new is:

1. A padlock comprising a casing, a shackle slidably carried thereby and having one of its arms positioned within the said casing and provided with a notch, a swing ing lock bolt within the said casing in normal resilient engagement with the said shackle arm and having a heel overlying the said notch when the shackle is in its locked position, a slidable releasing plate for the said bolt and a key operated swinging releasing finger for the said plate.

2. A padlock comprising a casing, a shackle slid-ably carried thereby and having one of its arms positioned within the said casing and provided with a notch, a swinging lock bolt within the said casing in normal resilient engagement with the said shackle arm and having a heel overlying the said notch when the shackle. is in its locked position, a slidable releasing plate for the said bolt and a key operated swinging releasing finger for the said plate, the other arm of said shackle being provided with a side notch and a beveled head positioned within the casing when the shackle is forced inwardly a swinging catch arranged within the casing and having a hooked end resiliently positioned within the path of movement of thesaid shackle arm head and a stop arm carried by the said bolt in looking engagement with the said catch when the said bolt is in its locked position.

3. A padlock comprising a casing, a shackle slidably carried thereby and having one of its arms positioned within the said casing and provided with a notch, a swinging lock bolt within the said casing in normal resilient engagement with the said shackle arm and having a heel overlying the said notch when the shackle is in its locked position, a slidable releasing plate for the said bolt and a key operated swinging releasing finger for the said plate, the other arm of said shackle being provided with a side notch and a beveled head positioned within the casing when the shackle is forced inwardly, a swinging catch arranged within the casing and having a hooked end resiliently positioned within the path of movement of the said shackle arm head, a stop arm carried by the said bolt in looking engagement with the said catch when the said bolt is in its locked position, a shaft journaled in the front plate of the said casing, a ward upon the inner end of the said shaft having a path of movement within the plane of the said catch and provided with a journaling socket, a pivot post car: ried by the casing and arranged within the said socket, an operating knob upon the outer end of the said shaft exteriorly of the said front plate, a take-up spring upon the said shaft between the said ward and front plate and a resiliently mounted stop carried by the said casing in constant engagement with the said shaft.

4. A lock including a casing, a shackle having arms of different lengths positionable within the said casing when the shackle is forced inwardly, an engaging catchflfor the shorter shackle arm and an independent lock bolt for the longer shackle arm, stop means for the said catch carried by the said bolt and separately operable releasing means for the said catch and bolt, the catch being operable only subsequent to the release of the lock bolt.

In testimony whereof I aflix my signature.

JAMES ROLKA.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. 0. 

